Hazy Shade in Dayton is a great store. They let you putt for a discount on each premium disc you buy. Seemed like good guys.

The PIAS in the Tri-County area of Cincinnati has a decent selection. Mostly Innova and Discraft, but I did find a couple of Evo Wizards for under $10 each.

I know there's a pro shop at Mt. Airy in Cincinnati as well, but I have not been to it.

The PIAS has expanded to include Gateway, Discmania, Lat/Westside/DD, Lightning, and MVP. They overprice their discs though. There's also Sweet-Tees in Fairfield that carries Innova, Discraft, and Lightning. If we're talking the Greater Cincinnati area, there's also Disc N Dat off the Turfway exit close to Lincoln Ridge and Idlewild. All three DG-specific store owners (ST, Airy, DnD) do a lot for the sport in the area and are great guys.